Locomotive driving box



Oct. 7, 1930. M. H. RoBER'i's 'LOCOKOTIVE DRIVING BOX Filed Sept. 9,192"! 2 Sheets-Sheet 1 I I. III

W A121\%NTOR I BY WQ YMW TTORNEYS M. H. ROBERTS LOCOBOTIVE DRIVING BOXFiled Sept. 9. 1927 2 Sheets-Sheet 2 Patented Oct. 7, 1930 UNITED.STATES PATENT OFFICE MONTAGUE n. ROBERTS, or nnennwoon, Na'wmm,assienonmo FRANKLIN nArL- WAY SUPPLY. com any, or NEW'Y0RK,Q1\T. Y., ACOBBORA'IION or DELAWARE LOCOMOTIVE mm Box Y 1 Applicationfiledseptember 9, 1927. Serial no. 218,427.

This invention relates to'locomotive driving boxes, particularly to awear compensating wedgelconstruction therefor. V

Among the more important objects of the 5 invention are the eliminationofthe necessity for lubrication by periodic application of oil or greaseon the relatively moving surfaces at the boxsides; the reduction ofwear; the provision of a constructionwhereinsuch .10 little wear'as doesoccur will accumulate on areadily and inexpensively replaced part; theelimination of. abnormal Idownward thrusts on the wedge such,forexample, as are caused at times by a downwardmovement ,15 of the boxinthe pedestal jaws combined with a starting thrust on the box from thedriving rod and, a construction which is simple and rugged and which maybe positively and effectively adjusted to compensate for wear; a 7

How theforegoing objects and advantages, together with others which willoccur to those skilled in this art, are obtained will be clear from thefollowing description considered in connection with drawings, inWhlCh-.. Fig. 1 is an end view of a locomotive driving boxandsurrounding structure With my improvements appliedthereto, in "theirpreferredv form,

the figure being partly in section and partly in elevation and certainof the parts being omitted and broken away for the sakeof clarity;

construction taken substantially the same as the view of Fig. l, andliig. 3 is a sectional view taken as indicated by the line 33 in Fig. 1.

Referring now to Figs. 1 and 3, the referside frame of a locomotive, andB indicates movement between downwardly extending pedestal jaws 3 and 4.A pedestal binder 5 secures the jaws 3 and 4 together and retains thebox between the jaws.

Shoe members 6 and 7 are provided for the j aws'8 and 4, respectively,and these members are provided with flanges 8 and 9, re

spectively, which embrace the jaws. The jaw the accompanying encecharacter A indicates a portion of the 3 and the member 6 are providedwith coop- .erating surfaces which are oppositely inclined orangled-with respect to the vertical plane of th'ebox; The member'tiservesias the wear-compensating wedge element. A11

adjusting bolt 10 is threaded in the pedestal binder 5 and extendsupwardly below, the wedge member 6. Its head 11 is seated in a recess 12in the member 6 and is free to rotate' therein; 1 The bolt is providedwith "a 'locknut 13. i v

A fioating plate 14 is interposed between the wedge and the box andismade slightly. shorter than-the vertical distance between the,pedestal'binder 5 and the frame member-A in 1 order to provide theclearance indicated at generally, the provision of 15 The face of theplate 14 adjacent box ple, asBabbitt metalor the lubricating materialknown to the trade as Lubrite. This material may be spunor veneeredo'nto these surfaces, 'or,as shown in the drawings, these and thematerial may be pressed thereintoto form the inserts 16. Y

The box" side of the shoe 7 and thesides of the flanges, 8 and 9whichareadjacentthe, embracing boxflange's17 are also provided b withtheanti-friction materialinserts.

v In service, when the boxmoves vertically Fig. 2 is a view of amodification of the between-the pedestal jaws, smallparticles of the"anti-friction material from the inserts;

will be spread all over' the relatively movthose surfaces. willalwayshave a relatively low coeflicient of friction.

j-Thisside ofthe wedge, therefore, has a relatively high coeflicient offriction" and will-resistany-tendency to move the wedge down wardly;

As the plate 14: is onlypermitted avery ,smallvertical movementpractically allfof the rubbing incidentto vertical movement of theboxwill take place between the side of "surfaces maybe provided with smallrecesses This towb e noted that the surface ofthel wedge 6 adjacent thepedestal jaw 3 a driving box which is mounted for vertical 7 1.; As anarticle of manufacture,

cumulate on this plate 14 which is an in-' expensively and easilyrenewed part of the structure. v

The modification of Fig. 2 is identical in construction with the form ofFig. 1, except that the floating plate 14 has been omitted and; thebox-structure has been arranged so thatthe face of the wedge itselfcontacts with the box. In this case the rubbing will occur. between thewedge and the box and anywea'r which may occur will accumulate on thewedge.

Attention i'sfldirected to the factthatucertain of thesubject matterdisclosed in the present caseis also disclosed in applicants earlierfiled copending application Serial No. 202,419, filed June 29, 1927,which earlier application contains broad claims to this subjectlriatter.

a wedge for locomotive driving boxes having its box side impregnatedwith anti-friction material. 2. As an article of manufacture, a'wedge mmber for locomotive driving-boxes, the box ,sideof-said wedge memberhavinga coefiicient of friction su-fliciently lowtoeliminate thenecessity for periodic applications of oil or grease, and the other sideof said wedge memher having a relatively high coefficient of friction; 7I v V 3. As an article ofmanu-facture, a wear compensating wedge forlocomotive driving boxes, said wedge hav ng inserts of" antifrictionmaterial in its box-side. I 4.- A driving box construction including apedestal jaw, a wedge having flanges embrac-' ing the jaw, a dIIVHI bOXhaving flanges embracingthe wedge anges and anti-friction materialcarried by the box side of the wedge and by the side of the wedgeflanges adjacent the box flanges. 5., A driving box constructionincluding,

in combination, a pair of pedestal-jaws, a box .tion material on theirbox sides. 7 j v 6. -A driving box constructlon including, in

between the jaws, a shoe member between each side-of the boxjand; itsrespective jaw, said members carrying inserts of anti-fric- 1eombinatiom'a pair of pedestal jaws, a box between the jaws, a shoemember between and one jaw and a floating between the wedge and the boxand one jaw and a floating "anti-friction material on their bracing itsrespective jaw, a box having flanges embracing the flanges of the shoemembers and anti-friction material carried by the box side of said shoemembers and by the surfaces of the flanges of the shoe members adjacentthe box flanges.

8. A driving box construction comprising, in combination, a pair ofpedestal jaws, a box between the jaws, a wedgebetween the box and oneand afloating plate interposed between the wedge and the box, said wedgecarrying antirfriction material on its box side.

91' A driving box construction comprising,

incombination, a pair of pedestal jaws, a box between the jaws, a wedgebetween the box plate interposed box, said wedge and plate carryinganti-friction material on their sides toward the box. 10. A driving boxconstruction comoris ing, in combination, a pair of pedestal jaws, a boxbetweenthe jaws, a wedge between the plate interposed between the wedgeand the box, said wedge" and plate being impregnated with sides towardthe box, together with means for adjusting said wedge.

11. A driving box construction comprising, in combination, a pair-"ofpedestal jaws, a box mounted between the jaws for vertical movement, awear compensating wedge between the box and one jaw and a floating plateinterposed between the box and the wedge, said wedge carryinganti-friction material on its box side, together with meansfor adjustingsaid wedge.

12. As an article of manufacture, a wear compensating wedge forlocomotive driving boxes, said wedge carrying on its box sidelubricating material for reducing the coeflicient of friction to a pointsufliciently low to eliminate. the necessity for periodic applica--tions of oil or grease.

whereof I have hereunto each side of the boxand its respective jaw,

said members carrying inserts of anti-friction material on their boxsides, and one of saidmembers and its surfaces angled with jaw havingcooperating lane of the box, together with means for adusting said lastmentioned member to compensate for the wear.

7 7'. Adri'ving box construction including,

in combination, a pair of, pedestal jaws, ashoemember for each'jawhaving flanges einrespect to the vertical

